A mobile station includes an estimation module, a filter module, and a filter selection module. The internal roof magnet further has an inner rim and an outer rim. An exposure method transfers a pattern of a mask onto a substrate and includes the steps of isolating a part spacing of an optical path spacing for an exposure beam which transfers the pattern of the mask onto the substrate from outside gas by using such a covering member. The first moving mechanism moves the position of the applicator relative to the surface along the surface. The heat exchanger used to heat the white water uses baffle trays to accommodate the contaminants in the white water. In yet another embodiment, the fibrous sheet material of the invention is biodegradable and the solution portion breaks down into a vaporizing component and a biodegradable carrier portion.